Infrared detection, smoke concentration and temperature alarm device

Abstract

The utility model provides an infrared detection and smoke concentration and temperature alarm device, and particularly relates to the technical field of infrared detection and smoke concentration and temperature alarm. The infrared pyroelectric sensor is connected with the single chip microcomputer circuit; the smoke sensor is connected with the single chip microcomputer circuit; the temperature sensor is connected with the single chip microcomputer circuit; and the sound-light alarm circuit is connected with the single-chip microcomputer circuit. According to the utility model, human body detection and fire alarm can be carried out at the same time, and people intruding into a monitoring area can be alarmed in time.

Description

Technical Field

[0001] The utility model relates to the technical field of infrared detection, smoke concentration and temperature alarm, in particular to an infrared detection, smoke concentration and temperature alarm device. Background Art

[0002] Infrared detection is a technology that uses infrared radiation (also known as infrared light) for detection, measurement, or imaging. Infrared light is a wavelength in the electromagnetic spectrum between visible light and microwaves, ranging from approximately 0.75 microns to 1000 microns. Because all objects radiate infrared energy above absolute zero (-273.15°C), infrared detection technology is widely used in industry, medicine, security, environmental monitoring, and other fields.

[0003] Smoke concentration and temperature alarm systems are important components of fire warning and security. They are used to monitor abnormal smoke or temperature changes in the environment in real time and issue alarms when danger occurs.

[0004] The existing intelligent alarm system is large in size and inconvenient to install, which increases the workload and is not easy to promote. In addition, the alarm system may also have problems such as false alarms when it alarms again. Utility Model Content

[0005] The utility model provides an infrared detection, smoke concentration and temperature alarm device, which consists of two parts: one is a human body detection anti-theft module composed of infrared pyroelectric sensors, and the other is a fire alarm module composed of smoke and temperature sensors.

[0006] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0007] An infrared detection, smoke concentration and temperature alarm device, comprising:

[0008] Single chip microcomputer circuit;

[0009] an infrared pyroelectric sensor connected to the single chip microcomputer circuit;

[0010] a smoke sensor connected to the single chip microcomputer circuit;

[0011] A temperature sensor connected to the single chip microcomputer circuit;

[0012] The sound and light alarm circuit is connected to the single chip microcomputer circuit.

[0013] In this specification, the single-chip microcomputer circuit includes a single-chip microcomputer chip U3, a capacitor C11, a capacitor C12, a capacitor C13, and a crystal oscillator Y1;

[0014] Pin 9 of the single-chip microcomputer chip U3 is connected to the negative electrode of the capacitor C11, the positive electrode of the capacitor C11 is connected to the external voltage terminal +5V, the pin 19 of the single-chip microcomputer chip U3 is connected to one end of the capacitor C12 and one end of the crystal oscillator Y1, the pin 18 of the single-chip microcomputer chip U3 is connected to one end of the capacitor C13 and the other end of the crystal oscillator Y1, and the other end of the capacitor C12 and the other end of the capacitor C13 are both grounded.

[0015] In this specification, the circuit of the infrared pyroelectric sensor includes an infrared pyroelectric sensor chip U1, a sliding rheostat RP1, a capacitor C1, a resistor R4, a resistor R1, a resistor R2, a resistor R3, a capacitor C4, a connector P1, a capacitor C8, a resistor R12, a resistor R9, an infrared pyroelectric sensor contact U2, a capacitor C7, a resistor R6, a resistor R7, a resistor R8, a sliding rheostat RP2, a capacitor C5, a resistor R11, a capacitor C2, a capacitor C6, and a resistor R10;

[0016] Pin 1 of the infrared pyroelectric sensor chip U1 is connected to pin 2 of the connector P1, pin 1 of the connector P1 and the positive electrode of the capacitor C8 are both grounded, pin 3 of the connector P1 is connected to one end of the resistor R4, pin 3 of the infrared pyroelectric sensor contact U2, pin 11 of the infrared pyroelectric sensor chip U1 and one end of the resistor R8, and then connected to the external voltage terminal VCC, pin 2 of the infrared pyroelectric sensor chip U1 is connected to one end of the resistor R1, the other end of the resistor R1 is connected to pin 10 of the single-chip microcomputer chip U3, and pin 3 of the infrared pyroelectric sensor chip U1 is connected to one end of the resistor R2. The other end of the resistor R2 is connected to the sliding end and the first fixed end of the sliding rheostat RP1, the pin 4 of the infrared pyroelectric sensor chip U1 is connected to the second fixed end of the sliding rheostat RP1 and one end of the capacitor C1, the other end of the capacitor C1 is grounded, the pin 5 of the infrared pyroelectric sensor chip U1 is connected to one end of the resistor R3 and the positive electrode of the capacitor C4, the negative electrode of the capacitor C4 and the pin 7 of the infrared pyroelectric sensor chip U1 are both grounded, the pin 8 of the infrared pyroelectric sensor chip U1 is connected to the other end of the resistor R4, the negative electrode of the capacitor C8 is connected to one end of the resistor R12 The pin 16 of the infrared pyroelectric sensor chip U1 is connected to one end of the capacitor C7, one end of the resistor R6 and the negative electrode of the capacitor C6, the pin 15 of the infrared pyroelectric sensor chip U1 is connected to the other end of the capacitor C7, the other end of the resistor R12 and the other end of the resistor R6, the pin 14 of the infrared pyroelectric sensor chip U1 is connected to one end of the capacitor C2, one end of the resistor R11 and the pin 2 of the infrared pyroelectric sensor contact U2, and the pin 13 of the infrared pyroelectric sensor chip U1 is connected to one end of the capacitor C5, one end of the resistor R10, the sliding end of the sliding rheostat RP2 and the first fixed end , pin 12 of the infrared pyroelectric sensor chip U1 is connected to one end of the resistor R7 and the other end of the capacitor C5, the other end of the resistor R7 is connected to the second fixed end of the sliding rheostat RP2, pin 10 of the infrared pyroelectric sensor chip U1 is linked to one end of the resistor R9, the other end of the resistor R9 is grounded, pin 9 of the infrared pyroelectric sensor chip U1 is connected to the other end of the resistor R8, the other end of the resistor R10 is connected to the positive electrode of the capacitor C6, the other end of the capacitor C2 and one end of the resistor R11 are both grounded, and pin 1 of the infrared pyroelectric sensor contact U2 is grounded.

[0017] In this specification, the circuit of the smoke sensor includes a smoke sensor chip U4, a resistor R14, a resistor R15 and an ADC module U7;

[0018] Pin 5 of the smoke sensor chip U4 is connected to one end of the resistor R14, pin 6 and pin 4 of the smoke sensor chip U4 are connected to one end of the resistor R15 and pin 2 of the ADC module U7, the other end of the resistor R14 and the other end of the resistor R15 are both grounded, and pin 1, pin 5 and pin 7 of the ADC module U7 are respectively connected to pin 24, pin 22 and pin 23 of the microcontroller chip U3 in a one-to-one correspondence.

[0019] In this specification, the circuit of the temperature sensor includes a temperature sensor chip U6 and a resistor R19;

[0020] Pin 2 of the temperature sensor chip U6 is connected to one end of the resistor R19 and pin 21 of the single-chip microcomputer chip U3 , and pin 3 of the temperature sensor chip U6 is connected to the other end of the resistor R9 and then connected to an external voltage terminal VCC.

[0021] In this specification, the sound and light alarm circuit includes a buzzer BUZZER1, a resistor R17, a resistor R18, an indicator light LED2, and a transistor Q1;

[0022] Pin 1 of the buzzer BUZZER1 is connected to the collector of the transistor Q1 and the positive electrode of the indicator light LED2, pin 2 of the buzzer BUZZER1 is connected to one end of the resistor R18 and pin 17 of the microcontroller chip U3 and then grounded, the other end of the resistor R18 is connected to the negative electrode of the indicator light LED2, one end of the resistor R17 is connected to pin 12 of the microcontroller chip U3, the base of the transistor Q1 is connected to the other end of the resistor R17, and the emitter of the transistor Q1 is connected to the external voltage terminal VCC.

[0023] This specification also includes a display circuit, which includes a display chip U5 and a resistor R16; pin 1 of the display chip U5 is connected to one end of the resistor R16 and then grounded, and the other end of the resistor R16 is connected to pin 3 of the display chip U5, and pins 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, and 14 of the display chip U5 are respectively connected to pins 28, 27, 26, 39, 38, 37, 36, 35, 34, 33, and 32 of the microcontroller chip U3.

[0024] In this manual, the USB chip and switch SW1 are also included;

[0025] Pin 1 of the USB chip is connected to pin 5 of the switch SW1 , and pin 2 of the switch SW1 is connected to an external voltage terminal VCC.

[0026] In this specification, it also includes switch KEY1, capacitor C16, resistor R5, switch KEY2, switch KEY3, switch KEY4 and switch KEY5;

[0027] Pin 1 of the switch KEY1 is connected to one end of the resistor R5 and the negative electrode of the capacitor C16, and pin 2 of the switch KEY1 is connected to pins 31 and 40 of the microcontroller chip U3 and the positive electrode of the capacitor C16, and then connected to the external voltage terminal VCC. The other end of the resistor R5 is connected to pin 9 of the microcontroller chip U3;

[0028] Pin 2 of the switch KEY2 is connected to pin 1 of the single-chip microcomputer chip U3, pin 2 of the switch KEY3 is connected to pin 2 of the single-chip microcomputer chip U3, pin 2 of the switch KEY4 is connected to pin 3 of the single-chip microcomputer chip U3, pin 2 of the switch KEY5 is connected to pin 4 of the single-chip microcomputer chip U3, and pin 1 of the switch KEY2 is connected to pin 1 of the switch KEY3, pin 1 of the switch KEY4 and pin 1 of the switch KEY5 and then grounded.

[0029] In this manual, it also includes connector P2, capacitor C9, capacitor C10, resistor R13, indicator LED1;

[0030] Pin 1 of the connector P2 is connected to one end of the capacitor C9, one end of the capacitor C10, and one end of the resistor R13 and then grounded. Pin 2 of the connector P2 is connected to the other end of the capacitor C9, the other end of the capacitor C10, and the positive electrode of the indicator light LED1. The negative electrode of the indicator light LED1 is connected to the other end of the resistor R13.

[0031] In summary, the present invention has at least the following beneficial effects:

[0032] The utility model can simultaneously perform human body detection and fire alarm by arranging a single chip circuit, an infrared pyroelectric sensor, a smoke sensor, a temperature sensor and an audible and visual alarm circuit, and can timely alarm people who break into the monitoring area. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following briefly introduces the drawings required for use in the description of the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0034] Figure 1 This is a schematic diagram of the infrared detection, smoke concentration and temperature alarm device involved in the present utility model.

[0035] Figure 2 It is a schematic diagram of the single chip microcomputer circuit involved in the utility model.

[0036] Figure 3 It is a schematic diagram of the infrared pyroelectric sensor involved in the present utility model.

[0037] Figure 4 This is a schematic diagram of the connector P2 involved in the present invention.

[0038] Figure 5 It is a schematic diagram of the display circuit involved in the present utility model.

[0039] Figure 6 The figure is a schematic diagram of the sound and light alarm circuit involved in the present utility model.

[0040] Figure 7 This is a schematic diagram of the USB chip involved in the present invention.

[0041] Figure 8 This is a schematic diagram of the temperature sensor involved in the present invention.

[0042] Figure 9 This is a schematic diagram of the smoke sensor involved in the present invention.

[0043] Figure 10 It is a schematic diagram of the switch KEY1 involved in the present invention.

[0044] Figure 11 It is a schematic diagram of the switch KEY2 involved in the present invention. DETAILED DESCRIPTION

[0045] Hereinafter, only certain exemplary embodiments are briefly described. As will be appreciated by those skilled in the art, the described embodiments may be modified in various ways without departing from the spirit or scope of the embodiments of the present invention. Therefore, the drawings and description are to be regarded as illustrative in nature and not restrictive.

[0046] The disclosure below provides many different embodiments or examples for implementing different structures of the embodiments of the present invention. In order to simplify the disclosure of the embodiments of the present invention, the components and settings of specific examples are described below. Of course, these are merely examples and are not intended to limit the embodiments of the present invention. In addition, the embodiments of the present invention may repeat reference numbers and / or reference letters in different examples. Such repetition is for the purpose of simplicity and clarity and does not in itself indicate the relationship between the various embodiments and / or settings discussed.

[0047] The embodiments of the present invention are described in detail below with reference to the accompanying drawings.

[0048] like Figure 1 As shown, this embodiment provides an infrared detection, smoke concentration and temperature alarm device, including:

[0049] Single chip microcomputer circuit;

[0050] an infrared pyroelectric sensor connected to the single chip microcomputer circuit;

[0051] a smoke sensor connected to the single chip microcomputer circuit;

[0052] A temperature sensor connected to the single chip microcomputer circuit;

[0053] The sound and light alarm circuit is connected to the single chip microcomputer circuit.

[0054] In some embodiments, as Figure 2 As shown, the single-chip microcomputer circuit includes a single-chip microcomputer chip U3, a capacitor C11, a capacitor C12, a capacitor C13, and a crystal oscillator Y1;

[0055] Pin 9 of the single-chip microcomputer chip U3 is connected to the negative electrode of the capacitor C11, the positive electrode of the capacitor C11 is connected to the external voltage terminal +5V, the pin 19 of the single-chip microcomputer chip U3 is connected to one end of the capacitor C12 and one end of the crystal oscillator Y1, the pin 18 of the single-chip microcomputer chip U3 is connected to one end of the capacitor C13 and the other end of the crystal oscillator Y1, and the other end of the capacitor C12 and the other end of the capacitor C13 are both grounded.

[0056] In some embodiments, as Figure 3 As shown, the circuit of the infrared pyroelectric sensor includes an infrared pyroelectric sensor chip U1, a sliding rheostat RP1, a capacitor C1, a resistor R4, a resistor R1, a resistor R2, a resistor R3, a capacitor C4, a connector P1 (one end of which is connected to the power supply (VCC), and is connected to the relevant pins of the chip U1 (BISS0001) through a capacitor C8 (22μF) to introduce the power supply signal into the chip circuit part), a capacitor C8, a resistor R12, a resistor R9, an infrared pyroelectric sensor contact U2, a capacitor C7, a resistor R6, a resistor R7, a resistor R8, a sliding rheostat RP2, a capacitor C5, a resistor R11, a capacitor C2, a capacitor C6, and a resistor R10;

[0057] Pin 1 of the infrared pyroelectric sensor chip U1 is connected to pin 2 of the connector P1, pin 1 of the connector P1 and the positive electrode of the capacitor C8 are both grounded, pin 3 of the connector P1 is connected to one end of the resistor R4, pin 3 of the infrared pyroelectric sensor contact U2, pin 11 of the infrared pyroelectric sensor chip U1 and one end of the resistor R8, and then connected to the external voltage terminal VCC, pin 2 of the infrared pyroelectric sensor chip U1 is connected to one end of the resistor R1, the other end of the resistor R1 is connected to pin 10 of the single-chip microcomputer chip U3, and pin 3 of the infrared pyroelectric sensor chip U1 is connected to one end of the resistor R2. The other end of the resistor R2 is connected to the sliding end and the first fixed end of the sliding rheostat RP1, the pin 4 of the infrared pyroelectric sensor chip U1 is connected to the second fixed end of the sliding rheostat RP1 and one end of the capacitor C1, the other end of the capacitor C1 is grounded, the pin 5 of the infrared pyroelectric sensor chip U1 is connected to one end of the resistor R3 and the positive electrode of the capacitor C4, the negative electrode of the capacitor C4 and the pin 7 of the infrared pyroelectric sensor chip U1 are both grounded, the pin 8 of the infrared pyroelectric sensor chip U1 is connected to the other end of the resistor R4, the negative electrode of the capacitor C8 is connected to one end of the resistor R12 The pin 16 of the infrared pyroelectric sensor chip U1 is connected to one end of the capacitor C7, one end of the resistor R6 and the negative electrode of the capacitor C6, the pin 15 of the infrared pyroelectric sensor chip U1 is connected to the other end of the capacitor C7, the other end of the resistor R12 and the other end of the resistor R6, the pin 14 of the infrared pyroelectric sensor chip U1 is connected to one end of the capacitor C2, one end of the resistor R11 and the pin 2 of the infrared pyroelectric sensor contact U2, and the pin 13 of the infrared pyroelectric sensor chip U1 is connected to one end of the capacitor C5, one end of the resistor R10, the sliding end of the sliding rheostat RP2 and the first fixed end , pin 12 of the infrared pyroelectric sensor chip U1 is connected to one end of the resistor R7 and the other end of the capacitor C5, the other end of the resistor R7 is connected to the second fixed end of the sliding rheostat RP2, pin 10 of the infrared pyroelectric sensor chip U1 is linked to one end of the resistor R9, the other end of the resistor R9 is grounded, pin 9 of the infrared pyroelectric sensor chip U1 is connected to the other end of the resistor R8, the other end of the resistor R10 is connected to the positive electrode of the capacitor C6, the other end of the capacitor C2 and one end of the resistor R11 are both grounded, and pin 1 of the infrared pyroelectric sensor contact U2 is grounded.

[0058] In some embodiments, as Figure 9 As shown, the circuit of the smoke sensor includes a smoke sensor chip U4, a resistor R14, a resistor R15 and an ADC module U7;

[0059] Pin 5 of the smoke sensor chip U4 is connected to one end of the resistor R14, pin 6 and pin 4 of the smoke sensor chip U4 are connected to one end of the resistor R15 and pin 2 of the ADC module U7, the other end of the resistor R14 and the other end of the resistor R15 are both grounded, and pin 1, pin 5 and pin 7 of the ADC module U7 are respectively connected to pin 24, pin 22 and pin 23 of the microcontroller chip U3 in a one-to-one correspondence.

[0060] In some embodiments, as Figure 8 As shown, the circuit of the temperature sensor includes a temperature sensor chip U6 and a resistor R19;

[0061] Pin 2 of the temperature sensor chip U6 is connected to one end of the resistor R19 and pin 21 of the single-chip microcomputer chip U3 , and pin 3 of the temperature sensor chip U6 is connected to the other end of the resistor R9 and then connected to an external voltage terminal VCC.

[0062] In some embodiments, as Figure 6 As shown, the sound and light alarm circuit includes a buzzer BUZZER1, a resistor R17, a resistor R18, an indicator light LED2, and a transistor Q1;

[0063] Pin 1 of the buzzer BUZZER1 is connected to the collector of the transistor Q1 and the positive electrode of the indicator light LED2, pin 2 of the buzzer BUZZER1 is connected to one end of the resistor R18 and pin 17 of the microcontroller chip U3 and then grounded, the other end of the resistor R18 is connected to the negative electrode of the indicator light LED2, one end of the resistor R17 is connected to pin 12 of the microcontroller chip U3, the base of the transistor Q1 is connected to the other end of the resistor R17, and the emitter of the transistor Q1 is connected to the external voltage terminal VCC.

[0064] In some embodiments, as Figure 5 As shown, it also includes a display circuit, which includes a display chip U5 and a resistor R16; pin 1 of the display chip U5 is connected to one end of the resistor R16 and then grounded, and the other end of the resistor R16 is connected to pin 3 of the display chip U5, and pins 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, and 14 of the display chip U5 are respectively connected to pins 28, 27, 26, 39, 38, 37, 36, 35, 34, 33, and 32 of the microcontroller chip U3.

[0065] In some embodiments, as Figure 7 As shown, it also includes a USB chip and a switch SW1;

[0066] Pin 1 of the USB chip is connected to pin 5 of the switch SW1 , and pin 2 of the switch SW1 is connected to an external voltage terminal VCC.

[0067] In some embodiments, as Figure 10 and Figure 11 As shown, it also includes a switch KEY1, a capacitor C16, a resistor R5, a switch KEY2, a switch KEY3, a switch KEY4 and a switch KEY5;

[0068] Pin 1 of the switch KEY1 is connected to one end of the resistor R5 and the negative electrode of the capacitor C16, and pin 2 of the switch KEY1 is connected to pins 31 and 40 of the microcontroller chip U3 and the positive electrode of the capacitor C16, and then connected to the external voltage terminal VCC. The other end of the resistor R5 is connected to pin 9 of the microcontroller chip U3;

[0069] Pin 2 of the switch KEY2 is connected to pin 1 of the single-chip microcomputer chip U3, pin 2 of the switch KEY3 is connected to pin 2 of the single-chip microcomputer chip U3, pin 2 of the switch KEY4 is connected to pin 3 of the single-chip microcomputer chip U3, pin 2 of the switch KEY5 is connected to pin 4 of the single-chip microcomputer chip U3, and pin 1 of the switch KEY2 is connected to pin 1 of the switch KEY3, pin 1 of the switch KEY4 and pin 1 of the switch KEY5 and then grounded.

[0070] In some embodiments, as Figure 4 As shown, it also includes a connector P2 (for connecting an external power supply), a capacitor C9, a capacitor C10, a resistor R13, and an indicator LED1;

[0071] Pin 1 of the connector P2 is connected to one end of the capacitor C9, one end of the capacitor C10, and one end of the resistor R13 and then grounded. Pin 2 of the connector P2 is connected to the other end of the capacitor C9, the other end of the capacitor C10, and the positive electrode of the indicator light LED1. The negative electrode of the indicator light LED1 is connected to the other end of the resistor R13.

[0072] The technical concept of the present utility model is as follows:

[0073] The infrared detection, smoke concentration and temperature alarm device includes an infrared pyroelectric sensor, a smoke sensor and a temperature sensor. The infrared detection, smoke concentration and temperature alarm device is installed in a restricted area and mainly completes the monitoring of two parts:

[0074] 1. It monitors the heat emitted by the human body and judges the signal when someone breaks in. After confirmation, it automatically sends out an alarm message, which can be automatically or manually canceled.

[0075] 2. Monitor the surrounding environment according to the ambient temperature and smoke concentration. The smoke sensor and temperature sensor will automatically collect the surrounding environment information data and perform digital-to-analog conversion on the data (the single-chip microcomputer has a built-in AD module). When the temperature or smoke concentration exceeds the value pre-set by the program, the sound and light alarm will start to sound the alarm.

[0076] With a single-chip microcomputer as the central processor, the infrared detection, smoke concentration and temperature alarm device is specifically divided into an audible and visual alarm circuit, a display circuit, a single-chip microcomputer circuit, an infrared pyroelectric sensor, a smoke sensor and a temperature sensor.

[0077] Smoke sensor: MQ-2 smoke sensor is used to detect the ambient smoke concentration in real time and output analog signals. Temperature sensor: DS18B20 digital temperature sensor is used to collect ambient temperature data and directly output digital signals.

[0078] Single chip microcomputer circuit: It uses STC89C52 single chip microcomputer, which is responsible for data acquisition, processing and logical judgment, and the built-in ADC module converts the smoke analog signal.

[0079] The infrared detection, smoke concentration, and temperature alarm devices also include an ESP8266 wireless Wi-Fi module and a SIM800LGSM module. The ESP8266 wireless Wi-Fi module enables remote communication with the cloud platform and supports the TCP / IP protocol. The SIM800L GSM module sends alarm information to users and the fire department via text messages or voice dialing.

[0080] The sound and light alarm circuit includes a buzzer and an indicator light LED2, and an alarm is sounded through the buzzer and the indicator light LED2.

[0081] The display circuit uses LCD1602 liquid crystal display. The first line shows the smoke concentration, and the second line shows the ambient temperature and whether anyone has entered the monitored area.

[0082] The USB chip is powered by a +5V power supply, and the voltage and current transmitted from the outside world through the USB interface are limited to a certain value so that the microcontroller, infrared pyroelectric sensor, smoke sensor, and temperature sensor can work normally.

[0083] The infrared detection, smoke concentration and temperature alarm device is equipped with five switches (switch KEY1, switch KEY2, switch KEY3, switch KEY4 and switch KEY5), which are respectively Key1 reset button, Key2 manual alarm, key3 value reduction key / arm key, key4 value increase key, key5 enter the setting interface button. When an emergency occurs, you can press the manual alarm button to automatically alarm.

[0084] The infrared detection, smoke concentration, and temperature alarm device features an integrated hardware design with an 80mm x 60mm PCB. The housing is constructed of flame-retardant ABS and includes built-in magnetic and wall-mount mounting options. The infrared detection, smoke concentration, and temperature alarm device also includes wireless networking expansion: supporting Bluetooth Mesh and ZigBee wireless communication protocols, it automatically forms a network when multiple devices are linked, increasing coverage by 300%.

[0085] The working principle of this utility model:

[0086] 1. Environmental monitoring stage:

[0087] The smoke sensor detects the concentration of combustible gas in the air through electrochemical principles, outputs a 0-5V analog signal, and converts it into a digital value (resolution 12 bits) through ADC.

[0088] The temperature sensor directly outputs a digital signal, and the microcontroller reads the data every 200ms.

[0089] 2. Data processing stage:

[0090] The microcontroller performs sliding window mean filtering on the raw data to eliminate instantaneous interference (such as cooking fumes).

[0091] The temperature and smoke data are integrated by the single-chip computer to dynamically adjust the threshold sensitivity (for example, to reduce the false alarm rate of smoke in high temperature and low humidity environments).

[0092] 3. Multi-level alarm trigger:

[0093] Primary warning: When a single parameter exceeds the threshold, only the local sound and light alarm circuit is triggered to avoid frequent false alarms.

[0094] Fire confirmation: If the dual parameters continuously exceed the threshold and meet the fire characteristic curve (temperature rise rate > 3°C / s), the remote alarm will be activated immediately. The GSM module will dial 119 first and send GPS location information (external GPS module required).

[0095] 4. Low power management:

[0096] In the absence of an alarm, the MCU enters STOP Mode, with only the RTC clock running and the current reduced to 15μA.

[0097] The infrared pyroelectric sensor, smoke sensor, and temperature sensor wake up the microcontroller every 10 seconds to sample data and go back to sleep immediately after sampling.

[0098] The above-described embodiments are intended to illustrate the present invention, not to limit the present invention. Therefore, changes in illustrative values ​​or replacement of equivalent components should still fall within the scope of the present invention.

[0099] From the above detailed description, it will be clear to those skilled in the art that the present invention can indeed achieve the aforementioned objectives and is in compliance with the provisions of the Patent Law.

[0100] Although preferred embodiments of the present invention have been described, those skilled in the art may make additional changes and modifications to these embodiments once they understand the basic inventive concepts. Therefore, the appended claims are intended to be interpreted as including the preferred embodiments and all changes and modifications that fall within the scope of the present invention. The above description is merely a preferred embodiment of the present invention and is not intended to limit the present invention. It should be noted that any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention are intended to be included within the scope of protection of the present invention.

[0101] It should be noted that the above description of the relevant processes is for illustration and purpose only and does not limit the scope of application of this specification. For those skilled in the art, various modifications and changes can be made to the processes under the guidance of this specification. However, such modifications and changes are still within the scope of this specification.

[0102] The basic concepts have been described above. It will be apparent to those skilled in the art after reading this application that the above utility model disclosure is provided as an example only and does not constitute a limitation of this application. Although not explicitly stated herein, those skilled in the art may make various modifications, improvements, and amendments to this application. Such modifications, improvements, and amendments are suggested in this application and remain within the spirit and scope of the exemplary embodiments of this application.

[0103] At the same time, this application uses specific terms to describe the embodiments of this application. For example, "one embodiment," "an embodiment," and / or "some embodiments" refer to a certain feature, structure, or characteristic related to at least one embodiment of this application. Therefore, it should be emphasized and noted that "one embodiment," "an embodiment," or "an alternative embodiment" mentioned twice or more in different places in this specification does not necessarily refer to the same embodiment. In addition, certain features, structures, or characteristics in one or more embodiments of this application may be appropriately combined.

[0104] Similarly, it should be noted that in order to simplify the description disclosed in this application and thus help understand one or more utility model embodiments, in the foregoing description of the embodiments of this application, multiple features are sometimes combined into one embodiment, figure or description thereof.

Claims

1. An infrared detection, smoke concentration and temperature alarm device, characterized in that: include: Single chip microcomputer circuit; an infrared pyroelectric sensor connected to the single chip microcomputer circuit; a smoke sensor connected to the single chip microcomputer circuit; A temperature sensor connected to the single chip microcomputer circuit; An audible and visual alarm circuit is connected to the single chip microcomputer circuit; The single chip microcomputer circuit includes a single chip microcomputer chip U3, a capacitor C11, a capacitor C12, a capacitor C13, and a crystal oscillator Y1; Pin 9 of the single-chip microcomputer chip U3 is connected to the negative electrode of the capacitor C11, the positive electrode of the capacitor C11 is connected to the external voltage terminal +5V, pin 19 of the single-chip microcomputer chip U3 is connected to one end of the capacitor C12 and one end of the crystal oscillator Y1, pin 18 of the single-chip microcomputer chip U3 is connected to one end of the capacitor C13 and the other end of the crystal oscillator Y1, and the other end of the capacitor C12 and the other end of the capacitor C13 are both grounded; wherein, a display circuit is also included, and the display circuit includes a display chip U5 and a resistor R16; Pin 1 of the display chip U5 is connected to one end of the resistor R16 and then grounded, the other end of the resistor R16 is connected to pin 3 of the display chip U5, and pins 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, and 14 of the display chip U5 are respectively connected to pins 28, 27, 26, 39, 38, 37, 36, 35, 34, 33, and 32 of the microcontroller chip U3; The display circuit uses LCD1602 liquid crystal display. The first line shows the smoke concentration, and the second line shows the ambient temperature and whether someone has entered the monitoring area. Among them, it also includes a USB chip and a switch SW1; Pin 1 of the USB chip is connected to pin 5 of the switch SW1, and pin 2 of the switch SW1 is connected to an external voltage terminal VCC; Among them, it also includes switch KEY1, capacitor C16, resistor R5, switch KEY2, switch KEY3, switch KEY4 and switch KEY5; Pin 1 of the switch KEY1 is connected to one end of the resistor R5 and the negative electrode of the capacitor C16, and pin 2 of the switch KEY1 is connected to pins 31 and 40 of the single-chip microcomputer chip U3 and the positive electrode of the capacitor C16, and then connected to the external voltage terminal VCC. The other end of the resistor R5 is connected to pin 9 of the single-chip microcomputer chip U3; pin 2 of the switch KEY2 is connected to pin 1 of the single-chip microcomputer chip U3, pin 2 of the switch KEY3 is connected to pin 2 of the single-chip microcomputer chip U3, pin 2 of the switch KEY4 is connected to pin 3 of the single-chip microcomputer chip U3, and pin 2 of the switch KEY5 is connected to pin 4 of the single-chip microcomputer chip U3. Pin 1 of the switch KEY2 is connected to pin 1 of the switch KEY3, pin 1 of the switch KEY4, and pin 1 of the switch KEY5, and then grounded; The circuit of the infrared pyroelectric sensor includes an infrared pyroelectric sensor chip U1, a sliding rheostat RP1, a capacitor C1, a resistor R4, a resistor R1, a resistor R2, a resistor R3, a capacitor C4, a connector P1, a capacitor C8, a resistor R12, a resistor R9, an infrared pyroelectric sensor contact U2, a capacitor C7, a resistor R6, a resistor R7, a resistor R8, a sliding rheostat RP2, a capacitor C5, a resistor R11, a capacitor C2, a capacitor C6, and a resistor R10; Pin 1 of the infrared pyroelectric sensor chip U1 is connected to pin 2 of the connector P1, pin 1 of the connector P1 and the positive electrode of the capacitor C8 are both grounded, pin 3 of the connector P1 is connected to one end of the resistor R4, pin 3 of the infrared pyroelectric sensor contact U2, pin 11 of the infrared pyroelectric sensor chip U1 and one end of the resistor R8, and then connected to the external voltage terminal VCC, pin 2 of the infrared pyroelectric sensor chip U1 is connected to one end of the resistor R1, the other end of the resistor R1 is connected to pin 10 of the single-chip microcomputer chip U3, and pin 3 of the infrared pyroelectric sensor chip U1 is connected to one end of the resistor R2. The other end of the resistor R2 is connected to the sliding end and the first fixed end of the sliding rheostat RP1, the pin 4 of the infrared pyroelectric sensor chip U1 is connected to the second fixed end of the sliding rheostat RP1 and one end of the capacitor C1, the other end of the capacitor C1 is grounded, the pin 5 of the infrared pyroelectric sensor chip U1 is connected to one end of the resistor R3 and the positive electrode of the capacitor C4, the negative electrode of the capacitor C4 and the pin 7 of the infrared pyroelectric sensor chip U1 are both grounded, the pin 8 of the infrared pyroelectric sensor chip U1 is connected to the other end of the resistor R4, the negative electrode of the capacitor C8 is connected to one end of the resistor R12 The pin 16 of the infrared pyroelectric sensor chip U1 is connected to one end of the capacitor C7, one end of the resistor R6 and the negative electrode of the capacitor C6, the pin 15 of the infrared pyroelectric sensor chip U1 is connected to the other end of the capacitor C7, the other end of the resistor R12 and the other end of the resistor R6, the pin 14 of the infrared pyroelectric sensor chip U1 is connected to one end of the capacitor C2, one end of the resistor R11 and the pin 2 of the infrared pyroelectric sensor contact U2, and the pin 13 of the infrared pyroelectric sensor chip U1 is connected to one end of the capacitor C5, one end of the resistor R10, the sliding end of the sliding rheostat RP2 and the first fixed end , pin 12 of the infrared pyroelectric sensor chip U1 is connected to one end of the resistor R7 and the other end of the capacitor C5, the other end of the resistor R7 is connected to the second fixed end of the sliding rheostat RP2, pin 10 of the infrared pyroelectric sensor chip U1 is linked to one end of the resistor R9, the other end of the resistor R9 is grounded, pin 9 of the infrared pyroelectric sensor chip U1 is connected to the other end of the resistor R8, the other end of the resistor R10 is connected to the positive electrode of the capacitor C6, the other end of the capacitor C2 and one end of the resistor R11 are both grounded, and pin 1 of the infrared pyroelectric sensor contact U2 is grounded.

2. The infrared detection, smoke concentration and temperature alarm device according to claim 1, characterized in that: The circuit of the smoke sensor includes a smoke sensor chip U4, a resistor R14, a resistor R15 and an ADC module U7; Pin 5 of the smoke sensor chip U4 is connected to one end of the resistor R14, pin 6 and pin 4 of the smoke sensor chip U4 are connected to one end of the resistor R15 and pin 2 of the ADC module U7, the other end of the resistor R14 and the other end of the resistor R15 are both grounded, and pin 1, pin 5 and pin 7 of the ADC module U7 are respectively connected to pin 24, pin 22 and pin 23 of the microcontroller chip U3 in a one-to-one correspondence.

3. The infrared detection, smoke concentration and temperature alarm device according to claim 1, characterized in that: The circuit of the temperature sensor includes a temperature sensor chip U6 and a resistor R19; Pin 2 of the temperature sensor chip U6 is connected to one end of the resistor R19 and pin 21 of the single-chip microcomputer chip U3 , and pin 3 of the temperature sensor chip U6 is connected to the other end of the resistor R9 and then connected to an external voltage terminal VCC.

4. The infrared detection, smoke concentration and temperature alarm device according to claim 1, characterized in that: The sound and light alarm circuit includes a buzzer BUZZER1, a resistor R17, a resistor R18, an indicator light LED2, and a transistor Q1; Pin 1 of the buzzer BUZZER1 is connected to the collector of the transistor Q1 and the positive electrode of the indicator light LED2, pin 2 of the buzzer BUZZER1 is connected to one end of the resistor R18 and pin 17 of the microcontroller chip U3 and then grounded, the other end of the resistor R18 is connected to the negative electrode of the indicator light LED2, one end of the resistor R17 is connected to pin 12 of the microcontroller chip U3, the base of the transistor Q1 is connected to the other end of the resistor R17, and the emitter of the transistor Q1 is connected to the external voltage terminal VCC.

5. The infrared detection, smoke concentration and temperature alarm device according to claim 1, characterized in that: It also includes connector P2, capacitor C9, capacitor C10, resistor R13, and indicator LED1; Pin 1 of the connector P2 is connected to one end of the capacitor C9, one end of the capacitor C10, and one end of the resistor R13 and then grounded. Pin 2 of the connector P2 is connected to the other end of the capacitor C9, the other end of the capacitor C10, and the positive electrode of the indicator light LED1. The negative electrode of the indicator light LED1 is connected to the other end of the resistor R13.

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